Reddit reviews Butler Creek Flip-Open Eyepiece Scope Cover

Fast, flip-open designcustom fit for most scopesinstant action lids pop open at the touch of a thumbWater-tight, custom-fit friction mounts anchors them to your scopeair-tight semi-O-ring keeps out dust and moistureDimension given are the inner diameter so measure the outside diameter of your scope tube to get the proper fitperforms from -40 to 120 Degrees F,weighs less than an ounceIn order to get the right fit you need to a use a caliper to find the exact size of the objective and eyepiece bells and then check the size chart for capsSizes listed in table subject to change. For best accuracy, please check fit of caps before purchase